Jacobs, B. and Boadway, R. (2014). Optimal linear commodity taxation under optimal non-linear income taxation Journal of Public Economics, 117(1):201--210.
Dijk, \D.van\, Koopman, S., \van der Wel\, M. and Wright, J. (2014). Forecasting Interest Rates with Shifting Endpoints Journal of Applied Econometrics, 29(5):693--712.